Let X and Y be independent discrete random variables with probability mass functions given by k P(X: k) = P(Y = k) = CG), k = 3,4,5,..., Let Z = X + Y 2. Find P(Z s 5) = 3. For integer k 2 6 find P(Z = k) = A correct answer is 100, which can be typed in as follows: 1% A correct answer is O, which can be typed in as follows: 0 547k A correct answer is 16 ' (k 5) - , which can be typed in as follows: 16*( k5)>i